ﺗﻌﯿﯿﻦ ﻣﻘﺪار ﺑﻬﯿﻨﻪ ﻧﺎﻧﻮذرات دي اﮐﺴﯿﺪﺗﯿﺘﺎﻧﯿﻮم در ﮐﺎﻣﭙﻮزﯾﺖ دي اﮐﺴﯿﺪﺗﯿﺘﺎﻧﯿﻮم/ﺑﻨﺘﻮﻧﯿﺖ ﺟﻬﺖ رﻧﮓﺑﺮي ﺳﻮﻧﻮﻓﺘﻮﮐﺎﺗﺎﻟﯿﺴﺘﯽ رﻧﮓ ﻣﺘﯿﻞاوراﻧﮋ

زﻣﯿﻨﻪ و ﻫﺪف: ﯾﮑﯽ از ﻣﻬﻢﺗﺮﯾﻦ آﻻﯾﻨﺪه ﻫﺎي ﻣﺤﯿﻂ زﯾﺴﺖ در ﭘﺴﺎب ﺻﻨﺎﯾﻊ، رﻧﮓ ﻣﯽ ﺑﺎﺷﺪ ﮐﻪ ﺑﺮاي اﻧﺴﺎن ﺧﻄﺮﻧﺎك ﺑﻮده و ﻣﺤﯿﻂ زﯾﺴﺖ را آﻟﻮده ﻣﯽ ﻧﻤﺎﯾﺪ. ﻫﺪف از اﯾﻦ ﭘﮋوﻫﺶ ﺗﻌﯿﯿﻦ ﻣﻘﺪار ﺑﻬﯿﻨﻪ ﻧﺎﻧﻮذرات دياﮐﺴﯿﺪﺗﯿﺘﺎﻧﯿﻮم در ﮐﺎﻣﭙﻮزﯾﺖ دياﮐﺴﯿﺪﺗﯿﺘﺎﻧﯿﻮم/ﺑﻨﺘﻮﻧﯿﺖ ﺟﻬﺖ رﻧﮓﺑﺮي ﺳﻮﻧﻮﻓﺘﻮﮐﺎﺗﺎﻟﯿﺴﺘﯽ رﻧﮓ ﻣﺘﯿﻞاوراﻧﮋ ﺑﻮد. روش ﺑﺮرﺳﯽ: در اﯾﻦ ﺑﺮرﺳﯽ، از ﺑﻨﺘﻮﻧﯿﺖ ﺑﻪ ﻋﻨﻮان ﭘﺎﯾﻪ ﺑﺮاي ﺗﺜﺒﯿﺖ ﻓﺘﻮﮐﺎﺗﺎﻟﯿﺴﺖ دياﮐﺴﯿﺪﺗﯿﺘﺎﻧﯿﻮم اﺳﺘﻔﺎده ﺷﺪ و ﻣﻘﺪار ﺑﻬﯿﻨﻪ ﻧﺎﻧﻮذرات ﺗﺜﺒﯿﺖ ﺷﺪه دياﮐﺴﯿﺪﺗﯿﺘﺎﻧﯿﻮم در ﮐﺎﻣﭙﻮزﯾﺖ دياﮐﺴﯿﺪﺗﯿﺘﺎﻧﯿﻮم/ﺑﻨﺘﻮﻧﯿﺖ ﺟﻬﺖ رﻧﮓﺑﺮي ﺳﻮﻧﻮﻓﺘﻮﮐﺎﺗﺎﻟﯿﺴﺘﯽ رﻧﮓ ﻣﺘﯿﻞاوراﻧﮋ ﻣﻮرد ارزﯾﺎﺑﯽ ﻗﺮار ﮔﺮﻓﺖ و ﺷﺮاﯾﻂ ﺑﻬﯿﻨﻪ ﻋﻤﻠﮑﺮد ﻓﺮاﯾﻨﺪ ﺳﻮﻧﻮﻓﺘﻮﮐﺎﺗﺎﻟﯿﺴﺘﯽ در ﺣﺬف رﻧﮓ ﺷﺎﻣﻞ اﺛﺮ ﭘﺎراﻣﺘﺮﻫﺎي pH ، ﻏﻠﻈﺖ ﻣﺘﯿﻞ اوراﻧﮋ و ﻏﻠﻈﺖ ﻧﺎﻧﻮﮐﺎﻣﭙﻮزﯾﺖ ﻧﯿﺰ ﻣﻮرد ﻣﻄﺎﻟﻌﻪ ﻗﺮار ﮔﺮﻓﺘﻨﺪ. ﯾﺎﻓﺘﻪﻫﺎ: ﺧﻮاص ﺳﺎﺧﺘﺎري ﻓﺘﻮﮐﺎﺗﺎﻟﯿﺴﺖﻫﺎي ﺗﺜﺒﯿﺖ ﺷﺪه و ﻧﺎﻧﻮذرات دياﮐﺴﯿﺪﺗﯿﺘﺎﻧﯿﻮم ﺑﺪون ﭘﺎﯾﻪ ﺑﺎ اﺳﺘﻔﺎده از آﻧﺎﻟﯿﺰﻫﺎي ﻣﯿﮑﺮوﺳﮑﻮپ اﻟﮑﺘﺮوﻧﯽ روﺑﺸﯽ، اﺳﭙﮑﺘﺮوﻓﺘﻮﻣﺘﺮ ﻃﯿﻒ ﺟﺬﺑﯽ و ﭘﺮاشﭘﺮﺗﻮاﯾﮑﺲ ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﮔﺮﻓﺖ. در ﻧﻬﺎﯾﺖ، اﻣﮑﺎن اﺳﺘﻔﺎده ﻣﺠﺪد از ﻓﺘﻮﮐﺎﺗﺎﻟﯿﺴﺖ در 3 دوره ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﮔﺮﻓﺖ. ﺑﺮ اﺳﺎس ﻧﺘﺎﯾﺞ ﻣﯿﮑﺮوﺳﮑﻮپاﻟﮑﺘﺮوﻧﯽروﺑﺸﯽ، ﮐﻢ ﮐﺮدن ﻣﻘﺪار دياﮐﺴﯿﺪﺗﯿﺘﺎﻧﯿﻮم ﻣﻮﺟﺐ ﮐﺎﻫﺶ ﺗﻌﺪاد ﻧﺎﻧﻮ ذرات ﺗﺸﮑﯿﻞ ﺷﺪه ﺑﺮ روي ﺳﻄﺢ ﺑﻨﺘﻮﻧﯿﺖ ﺷﺪ. آﻧﺎﻟﯿﺰﻫﺎي اﺳﭙﮑﺘﺮوﻓﺘﻮﻣﺘﺮﻃﯿﻒﺟﺬﺑﯽ و ﭘﺮاشﭘﺮﺗﻮاﯾﮑﺲ ﻧﺸﺎﻧﮕﺮ ﺗﺸﮑﯿﻞ ﻣﻮﻓﻘﯿﺖ آﻣﯿﺰ ﮐﺎﻣﭙﻮزﯾﺖ ﺑﻮد. ﻣﻘﺪار ﺑﻬﯿﻨﻪ ﻧﺎﻧﻮذرات دياﮐﺴﯿﺪﺗﯿﺘﺎﻧﯿﻮم در ﮐﺎﻣﭙﻮزﯾﺖ دياﮐﺴﯿﺪﺗﯿﺘﺎﻧﯿﻮم/ﺑﻨﺘﻮﻧﯿﺖ ﺟﻬﺖ رﻧﮓﺑﺮي ﺳﻮﻧﻮﻓﺘﻮﮐﺎﺗﺎﻟﯿﺴﺘﯽ رﻧﮓ ﻣﺘﯿﻞاوراﻧﮋ ﺑﺎ ﻧﺴﺒﺖ ﭘﻮدر دي اﮐﺴﯿﺪﺗﯿﺘﺎﻧﯿﻮم ﺑﻪ ﺑﻨﺘﻮﻧﯿﺖ 2/5:1 ﺑﺪﺳﺖ آﻣﺪ. ﺑﺤﺚ و ﻧﺘﯿﺠﻪ ﮔﯿﺮي: ﺗﺤﻘﯿﻖ اﻧﺠﺎم ﺷﺪه ﻧﺸﺎن داد اﻓﺰاﯾﺶ ﻣﻘﺪار ﻓﺘﻮﮐﺎﺗﺎﻟﯿﺴﺖ در ﻣﺤﯿﻂ واﮐﻨﺶ ﺑﺎﻋﺚ اﻓﺰاﯾﺶ ﺳﺮﻋﺖ و راﻧﺪﻣﺎن واﮐﻨﺶ رﻧﮕﺒﺮي ﺷﺪه اﻣﺎ اﻓﺰاﯾﺶ ﺑﯿﺶ از اﻧﺪازه آن ﺗﺎﺛﯿﺮ ﻣﻨﻔﯽ ﺑﺮ واﮐﻨﺶ داﺷﺖ. ﺑﻬﺘﺮﯾﻦ ﺷﺮاﯾﻂ ﺑﻪ دﺳﺖ آﻣﺪه در ﺗﺨﺮﯾﺐ رﻧﮓ ﻣﻮرد ﻣﻄﺎﻟﻌﻪ ﺑﺎ اﺳﺘﻔﺎده از ﻧﺎﻧﻮ ﮐﺎﻣﭙﻮزﯾﺖ دياﮐﺴﯿﺪﺗﯿﺘﺎﻧﯿﻮم / ﺑﻨﺘﻮﻧﯿﺖ ﺷﺎﻣﻞ pH اﺳﯿﺪي 4 ﺑﻮد. ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ ﻧﺘﺎﯾﺞ ﺑﻪدﺳﺖ آﻣﺪه، ﺑﺎ اﻓﺰاﯾﺶ ﻏﻠﻈﺖ رﻧﮕﺰا ﻣﺪت زﻣﺎن رﻧﮕﺒﺮي اﻓﺰاﯾﺶ ﯾﺎﻓﺖ. در ﻧﻬﺎﯾﺖ ﺑﺎزده ﺳﻮﻧﻮﻓﺘﻮﮐﺎﺗﺎﻟﯿﺴﺘﯽ ﮐﺎﻣﭙﻮزﯾﺖ ﭘﺲ از ﺳﻪ ﺑﺎر اﺳﺘﻔﺎده ﻣﺠﺪد ﻗﺎﺑﻞ ﻗﺒﻮل ﺑﻮد.

Background and Objectives: Dye is considered as one of the most important environmental pollutants in industrial wastewater due to its harmful effects on both human and environment. This study was aimed to determine Optimum Dioxide Titanium Nanoparticles in Dioxide Titanium /Bentonite Composite for sono photo catalytic de-colorization of Methyl Orange dye. Methods: In this study, bentonite was used as the substrate to stabilize titanium dioxide photo catalyst and the optimum amount of stabilized titanium dioxide nanoparticles in titanium dioxide/ bentonite composite was evaluated for sono photo catalytic removal of methyl orange dye. Accordingly, the optimal conditions for the photo catalytic process performance in dye removal included the effect of pH, methyl orange concentrations and nanocomposite doses. Findings: Structural properties of bentonite/titanium dioxide composites and pure titanium dioxide nanoparticles were investigated using scanning electron microscope (SEM), Diffuse Reflectance Spectroscopy (DRS) and Xray diffraction (XRD). Finally, the possibility of reuse of photo catalyst was investigated in three periods. Based on SEM results, reducing the amount of titanium dioxide reduced the number of nanoparticles formed on the bentonite surface. XRD and DRS analyses showed successful composite formation. The optimum amount of titanium dioxide nanoparticles in titanium dioxide/bentonite composite was obtained for sono photo catalytic dye removal of methyl orange with the titanium dioxide powder to bentonite ratio of 1: 2.5 in the primary mixture. Discussion and Conclusion: The study showed that increasing the amount of photo catalyst in the reaction medium increased the speed and efficiency of the dye removal but its excessive increase had a negative effect on the reaction. The best conditions for dye degradation were obtained using titanium dioxide/bentonite nanocomposite at pH 4. According to the results, the increase in concentration increased dye removal time. Finally, the sono photo catalytic composite efficiency was acceptable after three times of reuse.